@saxenanitesh852 Yes you will lose those settings. As for static and PPPoE settings on an MX, I have had mixed results with those staying on the device. I would suggest counting on the device losing those settings, and be happy if/when the device keeps those settings.
If you are moving the devices to a brand new organization, meraki support can do an 'Org Split' which will retain all device settings (but history data like client info will not be retained.This 'Org Split' only works when creating a new Org. It cannot move devices into an existing Org.